Remember the silent caterpillar drive from the movie The Hunt for Red October? The caterpillar drive was a fictional magnetohydrodynamic propulsion system. Magnetohydrodynamic (MHD) propulsion is a means of using...

This is arguably the tastiest way to design and learn about electronic circuits: make circuitry snacks! Two of Evil Mad Scientist favorite things in the world are playing with electronics and playing with food, and so...

During World War II, GIs in the field built really amazing simple radios to listen to. These were made with materials that they could get their hands on and were small enough to carry around in a big pocket. You can...

You have one drywall screw, one 1.5 V alkaline cell, six inches of plain copper wire, one small neodymium disk magnet, and no other tools or supplies. You have 30 seconds to make an electric motor running in excess of...

The Physics Education Research Group at the University of Minnesota has developed an interview tool to investigate physics faculty views about the learning and teaching of problem solving. In the part of the interview...